SLAP Tears: Why Fewer Are Repaired Than a Decade Ago
A SLAP tear is an injury to the top of the shoulder socket rim, where the biceps tendon anchors into it. Repairing these tears was once routine, and it is now done considerably less often. The reason is not that the repair does not work at all, but that a simpler alternative, cutting the biceps loose and reattaching it lower down, has repeatedly produced more reliable results with fewer complications.
This is a genuinely interesting story, and a different one from other operations that have fallen from favour. SLAP repair was not shown to be useless. It was quietly outperformed.
Dr MK Chan is a shoulder specialist who treats biceps and labral problems. This explains what the superior labrum does, why repairing it disappointed so often, how biceps tenodesis works instead, why age matters enormously here, and who still genuinely benefits from a repair.
What the Superior Labrum Does
A little anatomy makes the rest of this make sense.
The anchor point
The shoulder socket is ringed by a rim of cartilage called the labrum. At the very top of that ring, the long head of the biceps tendon runs into the joint and attaches directly into the labrum. So the superior labrum is not just a rim; it is the anchor point for a major tendon that runs down your arm.
What a SLAP tear is
SLAP stands for superior labrum anterior to posterior, which simply describes a tear running front to back across that top portion. Because the biceps anchors there, a SLAP tear is really an injury to the junction between the tendon and the socket rim. This is different from the tear that occurs with a dislocation, which is at the front-lower part of the rim and causes instability rather than pain on lifting.
Why that location is a problem for repair
The biceps pulls on that anchor constantly, in a direction that tends to lift the labrum away from the bone. A repair there is being asked to heal while a strong tendon is actively tugging at it. That mechanical reality goes a long way to explaining the results that follow.
Why SLAP Tear Repairs Disappointed
The results were never terrible. They were inconsistent, and inconsistency is its own problem.
The variability was extraordinary
Across published series, the proportion of patients reporting a good or excellent result after SLAP repair has ranged from about 40% to 94%, and return to the previous level of sport from about 20% to 94%. A range that wide tells you that outcomes depended heavily on who was operated on, and that a substantial number of people did not do well.
The specific complaints
Three problems recur in the literature. Persistent pain that the operation did not resolve. Stiffness afterwards, sometimes significant, because a repair at the top of the socket can tether the shoulder. And revision surgery, with reported failure or revision rates in throwing athletes of roughly 7.5% to 12.5%. In one ten-year study of young, active military patients, the failure rate for SLAP repair was around 40%.
And the alternative kept doing better
Meanwhile, the operation that simply removed the problem rather than repairing it produced complication rates and revision rates reported at zero in the same comparisons. When one option is variable and the other is consistent, practice shifts, and the data confirm that arthroscopic SLAP repair has genuinely declined.
Biceps Tenodesis: The Alternative
The logic behind it is elegant, and slightly counterintuitive.
What it involves
Rather than reattaching the torn labrum to the socket while the biceps continues to pull on it, the surgeon detaches the biceps tendon from the labrum altogether and fixes it to the upper arm bone instead. The tendon still works, because it is still anchored, just in a different and mechanically simpler place. The troublesome junction at the top of the socket is taken out of the equation.
Why it works better
Because it removes the source of the problem rather than trying to repair tissue that is under constant tension. There is nothing left at the top of the socket to pull loose, nothing to tether the shoulder into stiffness, and no repair to fail. The results reflect that: higher satisfaction, higher return to sport and lower revision rates in the comparisons that have been made.
The trade-off
The biceps does contribute something to shoulder stability, and moving its attachment is not biomechanically neutral. In practice this has not translated into worse outcomes for most patients, and the clinical results consistently favour tenodesis, but it is an honest caveat rather than a free lunch.
The Two Operations Compared
Set side by side, the differences that drove the change in practice are clear.
| Feature | SLAP repair | Biceps tenodesis |
| What is done | The torn labrum is reattached to the socket with anchors | The biceps tendon is detached from the labrum and refixed to the arm bone |
| Failure and revision | Reported around 7.5% to 12.5% in throwers | Reported at 0% in the same review |
| Complications | Reported from 0% up to about 22% | Reported at 0% in the same review |
| Stiffness afterwards | A recognised problem | Much less of an issue |
| Best suited to | Young patients with a genuine traumatic tear | Most others, and increasingly the default over 35 |
The failure and complication rows are what shifted opinion. The stiffness row is what patients themselves most often reported.
Age-Related Change Versus Injury
This distinction is central, and it is the same trap that exists with rotator cuff tears.
The superior labrum frays with age
Changes at the top of the labrum become increasingly common as people get older, and they are frequently found in shoulders that have never caused trouble. On top of that, several completely normal anatomical variants exist at that exact location, and they can look convincingly like a tear on an MRI to an untrained eye.
Which means the scan can mislead
A report describing a SLAP tear in a 50-year-old with shoulder pain may be describing a normal age-related finding rather than the cause of the pain. This is precisely the situation described for cuff tears, and the principle that why a scan finding is not a verdict applies just as strongly here. Operating on an incidental finding helps nobody.
A genuine injury looks different
A true, treatable SLAP tear typically follows a specific event: a fall on an outstretched arm, a sudden traction injury to the arm, or the repeated extreme loading of overhead throwing. It causes deep pain, often with clicking or catching, and it occurs in someone young enough that degenerative change is not the likely explanation. History matters at least as much as imaging.
Who Still Gets a Repair
Repair has not disappeared, and there remains a group for whom it is appropriate.
The young patient with a real tear
A genuinely traumatic SLAP tear in a young person, particularly someone in their teens or twenties with a clear injury and a healthy labrum otherwise, is still a reasonable candidate for repair. Preserving normal anatomy in a young shoulder has value, and this is the group in whom repair results have historically been best.
Where the age line sits
Over 35, tenodesis has become the more common choice and the evidence supporting it is strong. Under 35 the picture is less settled: some reviews find lower reoperation rates and better return to sport with tenodesis even in young patients, while others find no significant difference. So it is a genuine discussion rather than a rule, and reasonable surgeons differ.
The throwing athlete problem
Overhead throwers deserve a specific warning, because they are the group in whom both operations perform least well. Returning to high-level throwing after either procedure is unreliable, and in the available data pitchers fare worse than any other group with either option. Anyone whose sport depends on throwing at a high level should have a frank conversation about realistic expectations before agreeing to either operation.
Getting the first decision right
One further point argues for careful selection: tenodesis performed as the first operation gives better results than tenodesis performed after a failed repair. The salvage is worthwhile, and it is not as good as having chosen correctly at the outset.
The Bottom Line
SLAP tears involve the top of the shoulder socket where the biceps tendon anchors, and repairing them has fallen out of favour because the results were inconsistent: reported good outcomes ranging from 40% to 94%, along with stiffness, persistent pain and revision rates that a simpler alternative avoided. Biceps tenodesis, which detaches the tendon from the labrum and refixes it to the arm bone, removes the problem rather than repairing it, and has produced more reliable results with fewer complications.
Repair still suits young patients with genuinely traumatic tears, while over 35 tenodesis has largely become the default. Because superior labral changes are common with age and normal variants can mimic tears on imaging, the most important step is establishing whether the finding on the scan is actually causing the symptoms. This is another operation now done less often for good reasons, and the sensible first step is to have the shoulder properly assessed rather than to treat a report.
Frequently Asked Questions (FAQs)
What is a SLAP tear?
A SLAP tear is a tear of the superior labrum, the top part of the cartilage rim around the shoulder socket, running from front to back. It matters because the long head of the biceps tendon anchors directly into that part of the labrum, so the injury is effectively at the junction between the tendon and the socket. It differs from the tear caused by a dislocation, which affects the front-lower rim and causes instability.
Why are fewer SLAP tears repaired now?
Because results were inconsistent and a simpler alternative performed better. Reported good or excellent outcomes after repair ranged from about 40% to 94%, with recognised problems of persistent pain, post-operative stiffness and revision surgery. Biceps tenodesis, which removes the problematic attachment rather than repairing it, has shown higher satisfaction, better return to sport and lower revision rates, so practice has shifted accordingly.
What is biceps tenodesis?
Biceps tenodesis detaches the long head of the biceps tendon from its attachment on the superior labrum and refixes it to the upper arm bone. The tendon continues to function from its new anchor point, while the problematic junction at the top of the socket is removed. Because there is no repair under constant tension, there is nothing to pull loose and less tendency to stiffness.
Does a SLAP tear on my MRI mean I need surgery?
Not necessarily. Changes at the superior labrum become common with age and are often present in shoulders that cause no symptoms, and several normal anatomical variants in that region can resemble a tear on imaging. A SLAP tear reported on a scan may not be the cause of your pain. Establishing whether the finding explains your symptoms, through history and examination, matters more than the report itself.
Can you still have a SLAP repair?
Yes. Repair remains appropriate for younger patients, particularly those in their teens and twenties, with a genuinely traumatic tear and otherwise healthy tissue, where preserving normal anatomy has value. Over the age of 35, biceps tenodesis has become the more common choice. Between those situations the evidence is mixed and it is a legitimate discussion to have with your surgeon.
This article is general information and is not a substitute for individual medical advice. If you have shoulder pain or have been told you have a labral tear, see your general practitioner or a specialist for assessment.